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Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 34,537 $ 34,596
Marketable securities 335 8,319
Accounts receivable, net of allowance for doubtful accounts of $2,489 and $2,852 as of June 30, 2018 and December 31, 2017, respectively 29,837 28,316
Inventories 22,912 22,732
Current contract assets 3,419 0
Prepaid expenses and other current assets 3,339 3,816
Total current assets 94,379 97,779
Property and equipment, less accumulated depreciation of $54,096 and $51,099 as of June 30, 2018 and December 31, 2017, respectively 50,069 43,521
Intangible assets, less accumulated amortization of $22,799 and $20,656 as of June 30, 2018 and December 31, 2017, respectively 12,743 15,120
Goodwill 33,237 33,872
Other non-current assets 6,735 5,927
Non-current contract assets 6,266 0
Non-current deferred income tax asset 198 20
Total assets 203,627 196,239
Current liabilities:    
Accounts payable 16,775 15,736
Accrued compensation and employee-related expenses 4,866 5,358
Accrued other 8,289 9,210
Accrued product warranty costs 2,039 2,074
Deferred revenue 0 6,919
Current portion of long-term debt 4,990 2,482
Contract liabilities 11,051 0
Liability for uncertain tax positions 1,444 1,570
Total current liabilities 49,454 43,349
Other long-term liabilities 2,213 19
Long-term contract liabilities 8,374 0
Non-current deferred income tax liability 2,580 2,634
Long-term debt, excluding current portion 38,575 44,572
Total liabilities 101,196 90,574
Stockholders’ equity:    
Preferred stock, $0.01 par value. Authorized 1,000,000 shares; none issued 0 0
Common stock, $0.01 par value. Authorized 30,000,000 shares; 18,936,639 and 18,787,816 shares issued at June 30, 2018 and December 31, 2017, respectively; and 17,654,217 and 17,128,825 shares outstanding at June 30, 2018 and December 31, 2017, respectively 189 188
Additional paid-in capital 137,508 134,361
Accumulated deficit (12,401) (4,417)
Accumulated other comprehensive loss (12,701) (11,317)
Stockholders Equity Before Treasury Stock Adjustment 112,595 118,815
Less: treasury stock at cost, common stock, 1,282,422 and 1,658,991 shares as of June 30, 2018 and December 31, 2017, respectively (10,164) (13,150)
Total stockholders’ equity 102,431 105,665
Total liabilities and stockholders’ equity $ 203,627 $ 196,239